Siloxa-Tek 8500 - 1 Gallon Penetrating Concrete Sealer, Water and Salt Repellent An industrial-grade, water-based, silane/siloxane engineered to reduce water and moisture intrusion, while protecting concrete or masonry substrates from chlorides and deicing salts. Prevents deicing salt/chloride damage, freeze thaw damage, spalling, pitting, cracking, mold, mildew, efflorescence, dirt pick up Reduces water ingress, moisture intrusion and ASR Excellent water beading effect, excellent penetration, easy application, no appearance change, Low VOCs Department of Transportation approved